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Grafting of 4-(2,4,6-Trimethylphenoxy)benzoyl onto Single-Walled Carbon Nanotubes in Poly(phosphoric acid) via Amide Function

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Author(s): Han Sang-Wook | Oh Se-Jin | Tan Loon-Seng | Baek Jong-Beom

Journal: Nanoscale Research Letters
ISSN 1931-7573

Volume: 4;
Issue: 7;
Start page: 766;
Date: 2009;
Original page

Keywords: Single-walled carbon nanotube | Purification | Grafting | Polyphosphoric acid | Phosphorous pentoxide

ABSTRACT
Abstract Single-walled carbon nanotubes (SWCNTs), which were commercial grade containing 60–70 wt% impurity, were treated in a mild poly(phosphoric acid) (PPA). The purity of PPA treated SWCNTs was greatly improved with or without little damage to SWCNTs framework and stable crystalline carbon particles. An amide model compound, 4-(2,4,6-trimethylphenoxy)benzamide (TMPBA), was reacted with SWCNTs in PPA with additional phosphorous pentoxide as “direct” Friedel–Crafts acylation reaction to afford TMPBA functionalized SWCNTs. All evidences obtained from Fourier-transform infrared spectroscopy, Raman spectroscopy, thermogravimetric analysis, scanning electron microcopy, and transmission electron microscopy strongly supported that the functionalization of SWCNTs with benzamide was indeed feasible.

Tango Jona
Tangokurs Rapperswil-Jona

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